140 



THE UPPER EXTREMITY 



distal end of the forearm it is greatly reduced in size. In 

 a well-injected limb it will be seen to end on the dorsum of the 

 carpus by anastomosing with the volar interosseous artery 

 and the dorsal carpal arteries. In addition to the branches 



which it supplies to the 

 muscles, it gives off one 

 large branch called the 

 interosseous recurrent artery. 

 The arteria interossea 

 recurrens takes origin from 

 the parent trunk as it 

 appears between the supin- 

 ator and the abductor 

 pollicis longus, and turns 

 proximally, under cover of 

 the ancongeus muscle, to 

 reach the dorsal aspect of 

 the lateral epicondyle of 

 the humerus. The ancon- 

 seus should be detached 

 from its origin and thrown 

 medially, in order that the 

 artery may be traced to its 

 termination. The inter- 

 osseous recurrent artery 

 will then be seen to end 

 by anastomosing with the 

 posterior terminal branch 

 of the profunda artery of 

 the armr 



Anastomosis around 



A. brachialis 



A. profunda 

 ""brachii (O.T. 



superior profunda) 



A. collaterals 



ulnaris superior 



(O.T. inferior 

 profunda) 



A. collateralis 

 ___. ulnaris inferior 

 (O.T. anasto- 

 matic) 



Ant. terminal 

 branch of A. prc 

 funda brachii 



-.A. radialis 

 __.,A. ulnaris 

 T ...^Aa. recurrentes 



'tilnares 



_ ( A. interossea 

 recurrens 



.A. interossea dorsalis 

 "A. interossea volaris 



the Elbow - joint. The 



series of inosculations 

 around the elbow should 

 now be reviewed as a 

 whole. A distinct inos- 



FIG. 55. Diagram of Anastomosis around 

 the Elbow-joint. 



culation will be found to 



take place upon both the anterior and posterior aspect of each 

 epicondyle of the humerus. Behind the lateral epicondyle the 

 interosseous recurrent artery joins the posterior branch of the 

 profunda brachii artery : anterior to the same epicondyle the 

 anterior branch of the profunda brachii artery communicates 



